Around the perimeter of the deck, the I-beams that support the panels are welded to 4x4 steel columns.
They need to be handled carefully, because they will become the finished ceiling for the space beneath.
Shoring must be installed to support the panels during the pour, and it’s left in place while the concrete cures. Here, the pour stops have been removed from around the perimeter, showing the 1 1/2-inch formed overlap that allows for a drip edge over the trim that will be fastened to the steel girders.
The porch slab cures for about 28 days, after which the shoring can be removed, and finish materials applied to the steel frame.
Because the steel columns supporting the deck at ground level are in a flood plain, the author wrapped them with masonry block finished with stucco.
Columns and beams can also be finished with composite trim, which is attached to 2-by blocking fastened to the steel framing.